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Interactive effects of cover and hydraulics on brown trout habitat selection patterns

dc.contributor.authorAyllón Fernández, Daniel
dc.contributor.authorAlmodóvar Pérez, Ana María
dc.contributor.authorNicola, Graciela
dc.contributor.authorElvira Payán, Benigno
dc.date.accessioned2024-01-30T16:33:33Z
dc.date.available2024-01-30T16:33:33Z
dc.date.issued2008
dc.description.abstractHabitat modelling results are extremely sensitive to the habitat suitability criteria (HSC) used in the simulations. HSCs are usually expressed as univariate habitat suitability curves, although such univariate approach has been long questioned, since overlooking interactions between hydraulic variables may misrepresent the complexity of fish behaviour in habitat selection. It could lead to adopt erroneous flow management decisions based on misleading results. Furthermore, the interactive effects of hydraulic variables on habitat selection may be driven by the structural features of the channel, which determine cover availability. Therefore, we compared brown trout habitat selection patterns through multivariate resource selection functions (RSFs) in structurally contrasting rivers to unveil the interactive effects of hydraulics and cover elements and their consequences in univariate HSC results. Microhabitat preferences of young‐of‐the‐year (0+) trout were similar across fast and slow waters, meanwhile juvenile (1+) and adult (>1+) preferences significantly changed. RSFs for young‐of‐the‐year trout were consistent with univariate results and did not differ among water types. However, RSFs for older trout varied among water types and revealed complex interactions among hydraulic variables and between hydraulics and structural elements, which were not described accurately by univariate curves. Therefore, results suggest that interactions between water depth and current velocity have a significant effect on habitat selection patterns in juvenile and adult brown trout, this effect being controlled by cover availability.
dc.description.departmentDepto. de Biodiversidad, Ecología y Evolución
dc.description.facultyFac. de Ciencias Biológicas
dc.description.refereedTRUE
dc.description.sponsorshipUniversidad Complutense de Madrid
dc.description.sponsorshipGobierno de Navarra
dc.description.statuspub
dc.identifier.citationAyllón, D., et al. «Interactive Effects of Cover and Hydraulics on Brown Trout Habitat Selection Patterns». River Research and Applications, vol. 25, n.o 8, octubre de 2009, pp. 1051-65. https://doi.org/10.1002/rra.1215.
dc.identifier.doi10.1002/rra.1215
dc.identifier.essn1535-1467
dc.identifier.issn1535-1459
dc.identifier.officialurlhttps://doi.org/10.1002/rra.1215
dc.identifier.urihttps://hdl.handle.net/20.500.14352/96694
dc.issue.number8
dc.journal.titleRiver Research and Applications
dc.language.isoeng
dc.page.final1065
dc.page.initial1051
dc.publisherWiley
dc.rights.accessRightsrestricted access
dc.subject.ucmEcología (Biología)
dc.subject.unesco2401.06 Ecología Animal
dc.titleInteractive effects of cover and hydraulics on brown trout habitat selection patterns
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number25
dspace.entity.typePublication
relation.isAuthorOfPublication4a914557-0768-4a32-a3c8-4c57e76a4564
relation.isAuthorOfPublication1e8ff100-1548-4a44-baca-ae602b8938ad
relation.isAuthorOfPublication50fb2a45-c1e6-440f-9c5e-4bfda4874c92
relation.isAuthorOfPublication.latestForDiscovery4a914557-0768-4a32-a3c8-4c57e76a4564

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